Machine and method for forming helically wound paper tubes having improved mechanical resistance
AssigneeFabio Perini S.p.A.
InventorsMauro Gelli, Mario Gioni Chiocchetti
Life of this patent
Estimating the term…
Abstract
A machine for producing a tubular product by helical winding of strips of web material including a mandrel and a winding member to helically wind the strips of web material around the mandrel is disclosed. To improve adhesion between the strips, at least one pressure member is provided, cooperating with the mandrel, disposed downstream or upstream of the winding member with respect to the direction of advance of the tubular product being formed on the mandrel. The pressure exerted by the pressure member promotes adhesion of the strips forming the product.
Claims17
A machine for producing a tubular product by helical winding and gluing of strips of web material, comprising a mandrel, a winding member constructed and arranged to helically wind in an overlapping and staggered manner at least two strips of web material around said mandrel to form a tubular product, at least one pressure member cooperating with said mandrel and, in combination with said winding member, disposed along a path of the tubular product being formed on said mandrel, wherein pressure exerted by said pressure member promotes adhesion of the strips forming the tubular product,
- wherein said at least one pressure member comprises at least one wheel and an actuator to stress the at least one wheel and the mandrel against each other,
- wherein said at least one wheel is carried by a support arranged to slide in a sleeve and torsionally constrained to said sleeve,
- wherein said sleeve is arranged to be locked in an angularly adjustable position with respect to a fixed load-bearing structure,
- wherein said sleeve comprises a flange with slotted holes to lock said sleeve in said angularly adjustable position.
Dependencies are inferred from the claim text.